Boiler-furnace



A. DWBLLE. BOILER FURNAGE.

2 Sheets-Sheet 1.

(No Model.)

(No Model.) 2 Sheets-Sheet 2. 4

A. DWBLLE.

BUILER FURNACE.

No. 542,187. Y PatentedJuly 2, 1895.

l 'i5 Figure I illustrates ATENE Erica.

ALBERT DWELLE, OE LOUIS, MiSsOURi, ASSIGNOR To LZACHW. TINKER AND EMILY o.v DWELLE, oE SAME PLACR'AND CHARLES W. DWELLE AND CHARLES W; DWELLE, TRUSTEE, or DENVER, ooLoRADo.

BOILER-FURNACE'.

SPECIFICATION forming part of Letters Patent No. 542,187, dated July 1895. Y

Application tiled July 23,1894. Serial No. 518.316. (No modeLl vT @ZZ whom,v it muy conc/27%:

.Be it `known that yI, ALBERT DWELLE, ot

following-is a full, clear, and exact description, reference being had to the accompanying drawings, forming part ot' .this specification. w to My invention relates to that class of boilerfurnaces in which duid fuel is used; and my invention consists infeatures of novelty hereji'n'af-te'r fully described, and pointed out in theclaims. l l

myinvention, part in side viewand partin vertical section. Fig. II is atop or plan view, part inhorizontal section.

Referring to the drawings,1 represents the zo boiler containing the Water to be heated. It

is provided with suitable man-holes 2.

el represents the combustion-chamber, located within the boiler, and which is smaller in diameter than the boiler, so that a water- 'Space 4 is left between them. The combustionchamber is formed with a manhole 5, (see Fig. 11,) and which is closed by a head 6 and a suitable bridge 7. At the bottom of the chamber is a suitable tire-brick or other 3o grate S. Ascending from the top ofthe chainber 3 is a tlue 9, extending out through the top of the boiler and provided with a cap 10 at its upper end, and a bridge 1-1, and screws 12 for holding the cap in place.

13 represents pipes vor tubes leading from the combustion-chamber 3 through the wall of the boiler, and whichI areA provided with removable caps 14 on their outer ends, the caps being preferably screwed in place on the 4o tubes, as shown.

15 represents au oil-tank communicating' with the combustion chamber 3 through means of a pipe 16, having branches 17, which deliver the oil to the chamber 3.

In starting the furnace the caps 14 are removed from the tubes 13 and the cap 10 is removed from the line 9,'the oxygen to supply combustion entering through the tubes 'lil and the products of combustion passing 5o oil through the flue 0. After the furnace hasbeen in operation for a short time the cap 10 is applied to the ue 9 and lthe caps 14: are appliedto the tubes 13. The oil vcontinues to pass from the' tank 15 to the combustion-v chamber through the pipe 16 and branches 55 17, but it is introduced under pressure from a pump 18, connectedv with the tank., 15 through means of a pipe 19, and airl or oxygen is now introduced into the ,combustion-y chamber through means of api'pe 20, having 6" branches 2.1, forming a communication be-v tween tlie,combustion-chamber andan air-r e ceiver' 22, Which'is connected with the pump. 18 through means of a branch pipe 23,1eading off from the pipe 19. I ,have shown the oil.- pipe branches' 17 passing through the vupper ends otfthe' branches 21 ot' the air-pipe. The

oil and air are nowiptro'duced under pressure, andthe heatand products of combustionlinstead-.of passinygfout through the tine 9, es- 7a cape through valves 24 linto the boiler 1 indirect conta'e'trwith the Water. The Valves, as will befobserved, open outwardly, and they are forced oper. vby the pressure of the gases Wit-hin the chamber 3,-this pressure being thatinaturally due to combustion, augmeuted by the pressure ot` the pump, which introduces the air and oil.

I have shown two of the valves 21 located on the top of the chamber 3, and I have shown 8c one located in each of the short pipes 25, extending out from the lower end of the combustion-chamber into the manholes 2. Any desired number of these valves may be used, and they may be of any suitable form or construction. By thus admitting the gases and products ot combustion from the chamber 3 directly into the Water, or into the boiler containing the Water, the. full effect of the heat is obtained to generate steam,and no part of 9o' the heat passes oft' to the open air, as in the ordinary construction.

2G represents a steam-pipe leading off from the boiler andwhich I have shown provided with a branch 27, leading to the pump 18 for 95 operating the latter. The steam is conducted th'ough thel pipe 26 to any desired place of use.

28 represents a f hand-hold in the boiler 1.

'lhe diierent pipes, it will be understood. roo

are provided with valves wherever they are needed.

a combustion chamber, provided with valves,-

a boiler inclosine.r the combustion chamber, tubes for admitting air to the combustion chamber, and which are provided with suitable caps or doors, a tube for permitting the escape of the products of combustion from the combustion chamber, anrlrwhich is pro-- vided with a suitable cap or valve, and means for forcing oil and air into the combustion chamber; substantially as set forth.

3. In a boiler furnace, the combination of a boiler, a combustion chamber inclosed wholly within the boiler, valves opening from the top of said combustion chamber into the boiler, short pipes extending ont from the side of the combustion chamber and also provided with valves opening into the boiler, a valved outlet for the escape of products of combustion, and means for forcing fuel and air into the combustion chamber, substantially as and for the purpose set forth.

4. In a boiler furnace, the combination of a combustion chamber, provided with valves, a boiler inclosing the combustion'chamber, a flue communicating with the combustion chamber, and extending through-the boiler,

and provided with a cap or valve on its outer end, air fines communicating with the combustion chamber, and extending through the boiler, and provided with caps or valves on their outer ends, an oil tank, a pipe connecting the oil tank with the combustion chamber, a pump, a pipe forming a communication between the pump, and the combustion chamber, and a pipe forming a communication between the pump and said oil tank; substantially as set forth.

5. In a boiler furnace, the combination of a'combnstion chamber provided with valves, a boiler inclosing the combustion chamber, an oil tank, a pipe forminga communication between the oil tank and the combustion chamber, a pump, a'pipe forming a communication between the pump and the combustion chamber, and a pipe forming a communication between the pump and said oil tank; substantially as set forth.

6` In a boiler furnace, the combination of a combustion chamber, provided with valves, a boiler inclosiug the combustiony chamber, an oil tank, an air reservoir,a pipeforming a communication between the air reservoir and said combustion chamber, an oil tank, a pipe forming a communication between the oil tank and the combustion chamber, and which 'passes through theinner end of said air pipe, 

